$ cd /path/to/your/project
$ git init .
$ git remote add origin git@$HOST:$USER/$REPO.git
$ git push origin -u --all # first push
$ git status
$ git add . # add all files in this directory, recursively
$ git add -u # add all modified files and remove deleted ones
$ git commit -a -m '... message ...'
# -a adds all modified files, so you don't need to git add them
$ git push